package com.dycn.posdashboard.util;

import java.security.MessageDigest;

public class MD5Support {
    private static char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

    public static void main(String[] args){
    
    	System.out.println(MD5Support.MD5("yc.111111 "));
    	
    }
    
    public final static String MD5(String s) {

        try {
            byte[] strTemp = s.getBytes("UTF-8");
            //byte[] strTemp = s.getBytes();
            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(strTemp);
            byte[] md = mdTemp.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                //右移四位并截掉高四位
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                //直接截掉高四位
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }

    public final static String MD5(String s, String encoding) {
        try {
            byte[] strTemp;
            if (encoding != null)
                strTemp = s.getBytes(encoding);
            else
                strTemp = s.getBytes();
            //byte[] strTemp = s.getBytes();
            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(strTemp);
            byte[] md = mdTemp.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                //右移四位并截掉高四位
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                //直接截掉高四位
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }
}
